RLX COMPONENTS s.r.o. , Electronic Components Distributor.
RLX COMPONENTS s.r.o. , Electronic Components Distributor.
Pololu Jrk 21v3 USB Motor Controller with Feedback (POLOLU-1392)
The jrk 21v3 motor controller is a highly configurable brushed DC motor controller that supports four interface modes: USB, logic-level serial, analog voltage, and hobby radio control (RC). The controller can be used with feedback for closed-loop speed or position control, or it can be used without feedback as an open-loop speed control. The continuous output current is approximately 3 A in the recommended operating range of 8–28 V, with derated performance down to 5 V and transient protection to 40 V. The board ships with connectors included but not soldered in, allowing for custom installations. Compare all products in Pololu Jrk Motor Controllers with Feedback.
Motor driver: | MC33926 |
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Motor channels: | 1 |
Control interface: | USB; non-inverted TTL serial; RC servo pulses; analog voltage2 |
Minimum operating voltage: | 5 V |
Maximum operating voltage: | 28 V |
Continuous output current per channel: | 3 A |
Peak output current per channel: | 5 A |
Current sense: | 0.5 V/A3 |
Maximum PWM frequency: | 20 kHz |
Minimum logic voltage: | 4 V4 |
Maximum logic voltage: | 5 V |
Reverse voltage protection?: | Y |
Partial kit?: | Y |
1Without included hardware.2Autodetects baud rates between 300 and 115,200 bps, or can be set to any fixed baud rate in this range.3Current readings are converted to a digital number from 0-255.4In RC mode, the pulses can be as low as 2V.
The jrk 21v3 is a versatile, general-purpose motor controller that supports a variety of interfaces, including USB. The broad operating range from 5 V to 28 V and continuous output current of 3 A (5 A peak) allow this board to control most small DC brushed motors. Analog voltage and tachometer (frequency) feedback options allow quick implementation of closed-loop servo systems, and a free configuration utility (for Windows) allows easy calibration and configuration through the USB port.
Key improvements over competing products and earlier Pololu motor controllers with feedback include:
Note: A USB A to mini-B cable (not included) is required to connect this controller to a computer.
Motor channels: | 1 |
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Operating voltage: | 5 – 28 V |
Continuous output current: | 3 A |
Peak output current: | 5 A |
Auto-detect baud rate range: | 300 – 115,200 bps |
Available fixed baud rates: | 300 – 115,200 bps |
Available PWM frequencies: | 20 kHz, 5 kHz |
Reverse voltage protection?: | Yes |
USB connector style: | USB Mini-B |
The jrk 21v3 is the smaller of two jrk motor controllers. For a higher-power version, see the jrk 12v12.
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The jrk 21v3 is available in two versions: “fully assembled” with terminal blocks and 0.1″ male header pins pre-installed (left picture above), and connector-free (right picture above). The connector-free version includes a straight 0.1″ breakaway male header strip and two 3.5mm, 2-pin terminal blocks, but these parts are not soldered to the board, which allows for custom installations.
The three mounting holes are intended for use with #2 screws (not included).
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